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Why Is SharePoint Migration Manager Run Incremental Disabled?
Question details
The user is unable to click the 'Run incremental' button in SharePoint Migration Manager to start an update job.
- Product
- SharePoint Migration Manager
- Device & OS
- not provided
- Scenario
- Attempting to perform an incremental migration job after an initial data transfer to Microsoft 365.
- Observed behavior
- The 'Run incremental' button remains grayed out and disabled, preventing the incremental migration from launching.
Ensure that your initial migration job has completed successfully and that your Microsoft 365 admin account has the necessary permissions to manage migration tasks.
Allow Time for Background Validation
Wait for the migration manager to finish background checks before launching the incremental update.
The most common reason for a disabled 'Run incremental' button is that SharePoint Migration Manager is still performing background preparation. This includes validating the previous migration job, checking the source directory for changes, and preparing the cloud environment for incoming incremental updates.
Leave the SharePoint Migration Manager window open and wait a few minutes. Complex migrations with large file structures require more time to validate.
Refresh the Migration Manager dashboard to update the status of your current tasks.
Once the backend preparation is completely finished, the 'Run incremental' button will automatically become active and clickable.
Submit a Support Request in the Microsoft 365 Admin Center
Contact Microsoft support if the button remains persistently disabled without any clear error message.
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Frequently Asked Questions
What exactly does an incremental migration do in SharePoint?
An incremental migration scans the source location and copies only the files that have been created, modified, or updated since the initial or last successful migration job. This saves time and bandwidth compared to running a full migration again.
Can I run an incremental migration while users are modifying files?
Yes, incremental migrations are designed to capture delta changes. It is a common practice to run them periodically or right before finalizing a cutover while users continue working on the source files.
Does the incremental migration overwrite existing files in SharePoint?
By default, an incremental migration will overwrite an existing file in the SharePoint destination only if the source file has a newer modified date, ensuring you always have the most up-to-date version.
How do I view the progress of background validation?
SharePoint Migration Manager doesn't always show a granular progress bar for background validation. You must monitor the task status column in the Migration Manager dashboard; when the status updates to ready, the disabled button will become active.
